<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>

    function Person() {

        this.name = 'canvas'

    }

    person1 = new Person();
    //proto 指向构造函数的原型函数
    document.write(person1.__proto__ === Person.prototype)

</script>
</body>
</html>